光域均衡技术优化ROADM穿通能力应用研究

Research on Optimization of ROADM Penetration Capacity by Optical Do-main Equalization Technology

随着B100G OTN/WDM的大规模商用,当业务光信号经过多个ROADM网络节点,ROADM站点中上下路及直通方向的WSS会对穿通的光信号产生滤波损伤,特别是多级WSS级联后接收性能会产生严重劣化。该文针对ROADM组网穿通受限场景,开展光域均衡方案的研究与验证,通过对WSS通道设置相对衰减,提升系统等效带宽,进而改善骨干和城域核心网络中B100G信号的ROADM穿通能力。光域均衡方案不影响相干光模块背靠背性能,也不会在补偿带宽的同时放大高频噪声,可通过软件方式在线调整WSS通道内的每个频率分片的衰减,既不影响业务也不额外增加设备硬件成本,具有广泛的应用前景。

B100G OTN/WDM has been widely commercially deployed at the stage.When the service optical signals pass through multiple ROADM network nodes,the WSS in the up/down and through directions will cause filtering loss to the through optical signal.Particularly,the re-civing performance will be seriously deteriorated after cascading multiple wss.The paper fo-cused on the research and verification of optical domain cqualization technology for the ROADM limited penetration scenarios.The system's equivalent bandwidth can be enhanced by setting relative attenuation of WSS channels,thus it can improve the ROADM penetration capa-bility of BlooG signals in backbone and metropolitan core networks.The optical domain cquali-zation solution does not affect the coherency performance of optical modules,nor does it ampli-fy high-frequency noise while compensating bandwidth.It can adjust the attenuation of each fre-qucency slice online through software means without affecting services or adding extra hardware costs.It has a great potential for application.